Modified PVA membrane for separation of micro-emulsion

Yadav, Dharmveer; Karunanithi, Arthi; Saxena, Sumit; Shukla, Shobha

doi:10.1016/j.scitotenv.2022.153610

Cited by 29 publications

(12 citation statements)

References 43 publications

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“…The broad peaks at 1081 and 1020 cm −1 showed the C–O stretching vibration of CS 30 . For pure PVA, the peak at 3350 cm −1 was considered to be caused by O–H stretching vibrations between intermolecular/intramolecular hydrogen bonds 32 . The asymmetric stretching vibration at 2935 cm −1 was used to indicate the presence of the methylene group (CH 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…The special wettability of coating filter cloth offered the possibility to achieve the separation of oil‐in‐water emulsion 32 . In this study, xylene or soybean oil emulsion was selected as the separation sample.…”

Section: Resultsmentioning

confidence: 99%

“…30 For pure PVA, the peak at 3350 cm À1 was considered to be caused by O-H stretching vibrations between intermolecular/intramolecular hydrogen bonds. 32 The asymmetric stretching vibration at 2935 cm À1 was used to indicate the presence of the methylene group (CH 2 ). Peaks near 1423 and 1092 cm À1 showed C-H bending vibrations and C-O stretching, respectively.…”

Section: Characterization By Ftir Spectroscopy and Fe-sem Of Hapc-gelmentioning

confidence: 99%

“…The special wettability of coating filter cloth offered the possibility to achieve the separation of oil-in-water emulsion. 32 In this study, xylene or soybean oil emulsion was selected as the separation sample. After separation with five layers of coating filter cloth, the collected filtrate (right) was almost completely transparent compared with the original emulsion (left), as shown in Figure 7c,d.…”

Section: The Experiments Of Oil/water Mixture and Oil-in-water Emulsi...mentioning

confidence: 99%

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Chitosan interpenetrating polymer network hydrogels for oil–water and emulsion separation

Lei

et al. 2023

J of Applied Polymer Sci

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Hydrogels have obtained extensive attention in oil–water separation due to their high hydrophilicity and weak viscosity. However, most hydrogels have limited applications due to their subpar mechanical qualities. The interpenetrating network gives the hydrogel material high mechanical properties due to the presence of physical and chemical crosslinking. Hence, polyvinyl alcohol/chitosan/polyacrylamide interpenetrating polymer network hydrogel (HAPC‐Gel) was created in this study. HAPC‐Gel coating filter cloth showed underwater super‐oleophobic (the oil contact angles about 159°) and could stably separate oil–water mixtures in different oil phases and complex environments (acids, bases, salts), and the removal rate is still above 99% after 20 cycles of separation. Furthermore, the water could be divided from the oil‐in‐water emulsion. These results indicate that HAPC‐Gel composites have promising applications in oil–water separation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Characterization By Ftir Spectroscopy and Fe-sem Of Hapc-gelmentioning

confidence: 99%

Section: The Experiments Of Oil/water Mixture and Oil-in-water Emulsi...mentioning

confidence: 99%

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Chitosan interpenetrating polymer network hydrogels for oil–water and emulsion separation

Lei

et al. 2023

J of Applied Polymer Sci

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“…This membrane not only could efficiently separate motor-inwater emulsions, but also possessed excellent mechanical stability. 27 Nevertheless, the chemical stabilities of these membranes are unstable, so they cannot maintain long-term and effective emulsion separation properties in non-neutral environments. 28,29 Interestingly, polyvinylidene fluoride (PVDF) membrane can effectively avoid this obstacle benefiting from its good chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Underwater superoleophobic PVDF membrane with robust stability for highly efficient oil-in-water emulsion separation

et al. 2023

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Development of crosslinked polyvinyl alcohol nanofibrous membrane for microplastic removal from water

Gopakumar,

Ccanccapa‐Cartagena,

Bell

et al. 2024

J of Applied Polymer Sci

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This study presents the development of an innovative nanofibrous membrane to remove microplastics (MPs) from drinking water. This membrane exhibits additional functionality in removing lead (Pb), highlighting its promising potential for utilization as a point‐of‐use (POU) device. The polyvinyl alcohol (PVA) nanofibrous membranes are crosslinked using glutaraldehyde, and their efficiencies in the removal of MPs are evaluated. The results show that crosslinking the 7 and 10 wt% PVA nanofibers increases their average diameters to 330 and 581 nm, respectively, and enhances their surface area. The treatment efficiency of crosslinked PVA fibrous media is evaluated using polyethylene (PE) (5 μm ≤d ≤ 25 μm) and polystyrene (PS) MPs (d ≤ 1 μm). The filtration efficiencies of both 7 and 10 wt% c‐PVA nanofibrous media are found to be 99.8% ± 0.1% in the removal of PE MPs at pH 8. Further examination of the filtration efficiency in the removal of PS MPs shows that the highest removal efficiency achieved was 77.3% ± 1.4% at a pH of 6. Additionally, the lead removal efficiency of this fibrous membrane in flow‐through experiments is examined. Results show a pH‐dependent lead removal efficiency, in which the greatest efficiency of 69% is found at pH 6.

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Modified PVA membrane for separation of micro-emulsion

Cited by 29 publications

References 43 publications

Chitosan interpenetrating polymer network hydrogels for oil–water and emulsion separation

Chitosan interpenetrating polymer network hydrogels for oil–water and emulsion separation

Underwater superoleophobic PVDF membrane with robust stability for highly efficient oil-in-water emulsion separation

Development of crosslinked polyvinyl alcohol nanofibrous membrane for microplastic removal from water

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